Mars is being hit by rapid climate change and it is happening so fast that the red planet could lose its southern ice cap, writes Jonathan Leake. 
Scientists from Nasa say that Mars has warmed by about 0.5C since the 1970s. This is similar to the warming experienced on Earth over approximately the same period.
So is global warming actually caused by a periodic cycle of heightened sun activity, one that affects the other planets in the inner solar system as well?
Perhaps the real danger to the environment is the hot air currently being spewed by so many eco-lunatics.
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